Diagnostic Imaging
In order to make a proper diagnosis, physicians use images to locate and assess tumors and other abnormalities.
This is known as diagnostic imaging.
Through the use of state-of-the-art fixed and mobile scanners, FCS provides both image excellence and convenience to our patients. Our mobile scanners travel throughout Tampa, St. Petersburg, Bradenton, Venice, Port Charlotte, Ft. Myers (Broadway) and Cape Coral (Del Prado).
There are two types of diagnostic imaging available through Florida Cancer Specialists.
Computed Tomography (CT) Scans
CT Scans use x-rays to create cross-sectional pictures of the body. Small detectors inside the scanner measure the amount of x-rays that make it through the part of the body being studied. Computers use that information to create three-dimensional images of internal organs. These images can then be stored and viewed by physicians at any time. The scanning process requires the patient to lie down while being scanned. Once inside the scanner, the x-ray beam rotates around the patient. Some images require a special dye, called “contrast,” which may be given orally or intravenously. Contrast is used to highlight specific areas inside the body to create a clearer image.
Positron Emission Tomography (PET Scans)
Positron emission tomography, also called PET imaging or a PET scan, uses radioactive “tracers,” which the patient takes through an injection. The tracers emit signals to the scanner, which are translated into images.
PET scans require dietary and physical preparations. Your physician and our nursing staff will provide full instructions beforehand. Once the tracers have been administered, the patient rests, remaining still for a period in order to give the tracers time to circulate. When the resting time is complete, the patient lies on the scanner bed while a ring-shaped scanner is positioned over the body to collect the information transmitted from the tracers. This information is translated into images of the specific area of the body being observed. PET scans allow physicians to track blood flow, oxygen usage, glucose (sugar) metabolism, and more. Because cancer cells typically grow faster than normal cells, they metabolize more sugar. The scans trace this activity and allow your doctor to see how active a tumor is or how well a given treatment is working. We also have the ability to superimpose PET scans with CT scans to create one image from the two tests, leading to more precise diagnoses.
Questions about Diagnostic Imaging
When you arrive, you’ll complete a questionnaire, and your glucose and weight will be checked. Your specific procedure will be explained in detail. Our physicians and nursing staff will keep you informed each step of the way.
If you are having a PET scan, you’ll receive an injection of a high glucose solution that attaches to tumors or fast-growing cells. You will remain still for about 45 minutes in a comfortable recliner chair with soft, dim lighting.
For CT scans, you may be given contrast, which is taken either orally or through an injection. Your physician will decide if the contrast is necessary. The scan itself will last anywhere from 20-40 minutes, depending on the type of cancer and other factors.
Scans are not painful. On a rare occasion, patients may experience nausea from the oral contrast, but there are no lasting effects from PET or CT scans, and there is no pain in the test itself. Some patients experience anxiety from the closed environment of the scanners. If you suspect this may be an issue for you, talk to your physician who may prescribe a mild sedative to help you relax for the test.
In most cases, results are ready by your next doctor visit.
- Arrive 15 minutes early to complete paperwork.
- The Pet scan requires an injection and you will rest quietly for about an hour before the scan. Bring a portable MP3 player, or simply take the time to rest.
- The climate inside the facility is cool. We do have blankets available, but it’s a good idea to bring a comfortable sweater.
- The scanners cannot read through metal, so leave your jewelry at home. Ladies are asked not to wear underwire bras.
- If you anticipate anxiety in the process, you can request an anti-anxiety medication from your doctor beforehand.
- If you are required to take a contrast orally, you will be asked not to eat or drink anything for 4-6 hours before the CT scan. Complete information and instructions will be provided prior to your scan.
- Please refrain from any form of excercise the day before or the day of the scan or the glucose tracer will only be seen in your muscles.